Improvement in saw-mills



2 sheets s'heet I.

H. D. HALL. Saw-Mills.

Patented Jan. 12, I875.

lNVENT R WITNESSES 2 Sheets--Sheet 2.. H. D. HALL.

r Saw-Mills. a? No.158'703 PatentedJa n.12',1875.

ATTORNEYS THE GRAPkIC co, PHOTO -L:'tH.39& 4-1 PARK PLAcLNm UNITEDSTATES PATENT OFFICE.

HERMAN D. HALL, OF DENVER, COLORADO TERRITORY.

IMPROVEMENT IN SAW-M|LLS.

Specification forming part of Letters Patent No. 158,703, dated January12, 1875; application filed December 19, 1874. A

To all whom. it may concern:

Be it known that I, HERMAN D. HALL, of Denver, in the county of Arapahoeand in the Territory of Colorado, have invented certain new and usefulImprovements in Saw- Mills; and do hereby declare that the following isa full, clear, and exact description thereof, reference being had to theaccompanying drawings and to the letters of reference marked thereon,making a part of this specification.

The nature of my invention consists in the construction and arrangementof a mechanism for feeding the log-carriage of a saw-mill, whereby thelog may be fed at any desired rate of speed, while the power or drivingshaft is being run at the same rate of speed, as will be hereinaftermore fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in whichFigure l is a plan view, and Fig. 2 is a front elevation, of my machine.Fig. 3 is a vertical section of a pivoted journal box. Fig. 4 is avertical section through the line 00 as, Fig. 2.

A represents the driving-shaft, connected, by a beltor otherwise, withany suitable power for running the same. This shaft has its hearings inboxes a, which are placed in slots in vertical frames B B, and are helddown by means of rubber springs b, the tension of said springs beingregulated bymeans of set-screws (1 bearing upon metal plates 6, placedon top of the rubber springs. On the driving-shaft A, at suitabledistances apart, are secured a series of wheels, 0 O O O, increasinggradually in the length of their diameter from one end to the other. Erepresents the shaft, which communicates motion to the log-carriage bymeans of a cog-Wheel, G, secured on the inner end of the shaft, and

gearing with a rack-bar on the carriage. The inner end of the shaft Ehas its bearing in a journal-box, f, which is pivoted, as shown in Fig.3, on top of a suitable standard or frame. The outer end of the shaft Ehas its bearing in a journal-box, h, which is placed in a horizontal wayor guide, H, attached to the outer frame B, and the box it moved backand forth therein by a lever, I, or other suitable means. On the shaft Eare secured a series of wheels, D D D D, which correspond with thewheelsupon the driving-shaft A, and increase gradually in the length of theirdiameter in the opposite direction from that of the wheels on thedriving-shaft. The shafts A and E are arranged relatively to each otherin such a manner that when they are parallel with each other they willbe in difl'erent vertical planes, and none of the wheels on one shaftwill be in contact with a wheel on the other. As the outer end of theshaft E is moved so as to bring it under the driving-shaft A, the wheelD nearest the outer end will come in contact with the wheel 0 on thedriving-shaft, while none of the others are in contact. By moving theshaft still farther, the wheels D C will be thrown out of contact, andthe wheels D 0 brought in contact, with each other, and so on any one ofthe wheels on the shaft E may be thrown in contact with thecorresponding wheel on the driving-shaft, and thus move the log-carriageat any desired speed, while the driving-shaft continues at the same rateof speed.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a mechanism for feeding the log-carriage for saw-1nills, thecombination of the driving-shaft A and the movable shaft E, arranged indifferent vertical planes, and each provided with a series of wheels ofdifferent diameters, substantially as and for the purposes herein setforth.

2. The combination of the driving-shaft A, with wheels 0 (L O O, rubbersprings d, and the shaft E, with: wheels D D D D, pivoted box f, andsliding box h, all constructed and arranged to operate substantially asand for the purposes herein set forth.

Intestimony that I claim the foregoing I have hereunto set my hand this18th day of December, 1874.

I HERMAN D. HALL. Witnesses:

O. LEVERT, WM. L. BRAMHALL.

